WeatherCâu 76 / 100
An evening METAR reports the temperature and dew point as 14/12. What does this small spread tell the remote pilot?
a.The air is very dry, so visibility should improve through the night
b.A strong temperature inversion has formed just above the airport
c.Humidity is high and fog or low clouds are likely as cooling continues
d.The altimeter setting will fall rapidly over the next several hours
Giải thích
A 2 °C spread between temperature and dew point means the air is nearly saturated, and as the surface keeps cooling overnight the temperature can reach the dew point and produce fog or a low cloud deck. That directly threatens the 3 SM visibility and cloud clearance requirements for a dawn flight. A narrow spread indicates moist rather than dry air, and it says nothing by itself about inversions or the trend in the altimeter setting.
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